19702120

素因数分解:

$2^3\times 5^1\times {\mathrm{449}}^1\times {\mathrm{1097}}^1$

素因数の和:1557

約数の個数: 32

約数和(自身を含む): 44469000

約数和(自身を除く): 24766880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 449, 898, 1097, 1796, 2194, 2245, 3592, 4388, 4490, 5485, 8776, 8980, 10970, 17960, 21940, 43880, 492553, 985106, 1970212, 2462765, 3940424, 4925530, 9851060, 19702120]

約数ペア:

[(1, 19702120), (2, 9851060), (4, 4925530), (5, 3940424), (8, 2462765), (10, 1970212), (20, 985106), (40, 492553), (449, 43880), (898, 21940), (1097, 17960), (1796, 10970), (2194, 8980), (2245, 8776), (3592, 5485), (4388, 4490)]